/*
 * Copyright (c) 2011-2018, Meituan Dianping. All Rights Reserved.
 *
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements. See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.dianping.cat.status;

import java.util.List;
import java.util.concurrent.CopyOnWriteArrayList;

public class StatusExtensionRegister {

    private List<StatusExtension> extensions = new CopyOnWriteArrayList<StatusExtension>();
    private static final StatusExtensionRegister register = new StatusExtensionRegister();

    public static StatusExtensionRegister getInstance() {
        return register;
    }

    private StatusExtensionRegister() {
    }

    public List<StatusExtension> getStatusExtension() {
        return extensions;
    }

    public void register(StatusExtension extension) {
        extensions.add(extension);
    }

    public void unregister(StatusExtension extension) {
        extensions.remove(extension);
    }
}
